Entries < 1.0 are set to 1.0 for the purposes of the MELD score calculation.
Sodium is limited to a range of 125-140 (if outside these bounds, it is set to the nearest limit).

*For patients who have had dialysis twice, or 24 hours of CVVHD (within the last week), the creatinine value must be set to 4.0mg/dL.

UNOS (United Network for Organ Sharing), website= http://www.unos.org